docs: def info(gandi, resource, id, altnames, csr, cert, all_status):
      """ Display information about a certificate.
  
      Resource can be a CN or an ID
      """
      output_keys = ['cn', 'date_created', 'date_end', 'plan', 'status']
  
      if id:
          output_keys.append('id')
  
      if altnames:
          output_keys.append('altnames')
  
      if csr:
          output_keys.append('csr')
  
      if cert:
          output_keys.append('cert')
  
      ids = []
      for res in resource:
          ids.extend(gandi.certificate.usable_ids(res))
  
      result = []
      for num, id_ in enumerate(set(ids)):
          cert = gandi.certificate.info(id_)
          if not all_status and cert['status'] not in ['valid', 'pending']:
              continue
          if num:
              gandi.separator_line()
          cert['plan'] = package_desc(gandi, cert['package'])
          output_cert(gandi, cert, output_keys)
          result.append(cert)
  
      return result